SAA-C03 Design Secure Architectures Practice Question
This SAA-C03 practice question tests your understanding of design secure architectures. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A IoT ingestion API stores audit logs in S3. The compliance team requires that logs cannot be overwritten or deleted for seven years. What should be configured?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
S3 Object Lock in compliance mode with an appropriate retention period
Option D is correct because S3 Object Lock with compliance mode provides a write-once-read-many (WORM) model that prevents any user, including the root user, from overwriting or deleting objects for the specified retention period. This meets the compliance requirement of a seven-year immutable audit log, as compliance mode enforces a legal hold that cannot be removed by any entity, including AWS support.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
S3 lifecycle expiration after seven years
Why it's wrong here
Lifecycle expiration deletes data; it does not prevent deletion before that date.
✗
S3 versioning only
Why it's wrong here
Versioning preserves prior versions but does not prevent deletion or overwriting by authorized users.
✗
S3 server access logging
Why it's wrong here
Access logging records requests but does not enforce immutability.
✓
S3 Object Lock in compliance mode with an appropriate retention period
Why this is correct
Object Lock compliance mode enforces write-once-read-many retention that even privileged users cannot bypass during the retention period.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse versioning with immutability, thinking versioning alone prevents data loss, but it does not block overwrites or deletions of the current version, which is why Object Lock is required for true write-once-read-many protection.
Detailed technical explanation
How to think about this question
S3 Object Lock in compliance mode uses a retention period set at the object or bucket level, and once locked, the retention mode cannot be reduced or removed by any user, including the AWS account root user. Under the hood, compliance mode applies a legal hold that is enforced at the S3 API level, rejecting any PutObject or DeleteObject calls that would violate the retention period, and even lifecycle policies cannot expire objects before the retention date. A real-world scenario is financial audit logs where regulatory bodies require absolute immutability; compliance mode ensures that even an administrator with full permissions cannot tamper with the logs.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Design Secure Architectures — This question tests Design Secure Architectures — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: S3 Object Lock in compliance mode with an appropriate retention period — Option D is correct because S3 Object Lock with compliance mode provides a write-once-read-many (WORM) model that prevents any user, including the root user, from overwriting or deleting objects for the specified retention period. This meets the compliance requirement of a seven-year immutable audit log, as compliance mode enforces a legal hold that cannot be removed by any entity, including AWS support.
What should I do if I get this SAA-C03 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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